PROMETHEUS MR-20, Operator'S Manual

Page: 9 / 39

MR-20™ USB Operator’s Guide
Page 9 of 39
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ONNECTING THE
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ATHWAY
™ P
REAMPLIFIER
C
ABLES
Note: The two Pathway™ Preamplifier ( part# 2583 ) cables are color coded with white and gray
cable to distinguish which is EMG A or EMG B . Either preamplifier can be used for EMG A or EMG B.
Figure . Pathway Electrode (left). Pathway Electrode with white Pathway Preamplifier (right).
1.
Primary and secondary muscles are monitored by placing the active electrodes over the bulk
of the muscle. The Pathway™ Preamplifier (part# 2583) has three female snaps” two labeled
ACT (active) and one labeled GND (ground). Prepare the skin with an alcohol pad to avoid
high impedance artifact. Wipe dry with a tissue or cloth. Snap the Pathway™ Preamplifier
(part# 2583) onto one of the Pathway™ Electrodes (part# 6750) taking care to orient the
snaps correctly. Verify all three snaps are secure. Carefully remove the backing of the
Pathway™ (part# 6750) Electrode and place the two labeled
ACT (active) over the bulk of the
muscle with the length of the electrode parallel with the muscle fibers. Make certain the
Pathway™ Preamplifier (part# 2583) cable is fully seated into EMG A/EMG B input
channel(s).
2.
Accessory Muscles such as Abdominals, Leg Adductors and Gluteals are commonly monitored
by placing the active electrodes over the bulk of the muscle. In the example below the
Pathway™ Electrode (part# 6750) has been placed on the patient’s right side of the
abdomen, just above the pubic hairline.
Positioning the Patient Electrodes on the accessory muscle.